def send(self, widget, channelname, value, signal_id):
"""
send method compatible with OWBaseWidget.
"""
scheme = self.scheme()
try:
node = scheme.node_for_widget(widget)
except KeyError:
# The Node/Widget was already removed from the scheme.
log.debug("Node for %r is not in the scheme.", widget)
return
try:
channel = node.output_channel(channelname)
except ValueError:
log.error("%r is not valid signal name for %r", channelname,
node.description.name)
return
# Expand the signal_id with the unique widget id and the
# channel name. This is needed for OWBaseWidget's input
# handlers (Multiple flag).
signal_id = (widget.widget_id, channelname, signal_id)
SignalManager.send(self, node, channel, value, signal_id)
def __init__(self, scheme):
SignalManager.__init__(self, scheme)
scheme.installEventFilter(self)
self.__scheme_deleted = False
scheme.destroyed.connect(self.__on_scheme_destroyed)
scheme.node_added.connect(self.on_node_added)
scheme.node_removed.connect(self.on_node_removed)
scheme.link_added.connect(self.link_added)
scheme.link_removed.connect(self.link_removed)
def __init__(self, scheme):
SignalManager.__init__(self, scheme)
scheme.installEventFilter(self)
self.__scheme_deleted = False
scheme.destroyed.connect(self.__on_scheme_destroyed)
scheme.node_added.connect(self.on_node_added)
scheme.node_removed.connect(self.on_node_removed)
scheme.link_added.connect(self.link_added)
scheme.link_removed.connect(self.link_removed)
def event(self, event):
if event.type() == QEvent.UpdateRequest:
if self.__scheme_deleted:
log.debug("Scheme has been/is being deleted. No more " "signals will be delivered to any nodes.")
event.setAccepted(True)
return True
# Retain a reference to the scheme until the 'process_queued' finishes
# in SignalManager.event.
scheme = self.scheme()
return SignalManager.event(self, event)
def event(self, event):
if event.type() == QEvent.UpdateRequest:
if self.__scheme_deleted:
log.debug("Scheme has been/is being deleted. No more "
"signals will be delivered to any nodes.")
event.setAccepted(True)
return True
# Retain a reference to the scheme until the 'process_queued' finishes
# in SignalManager.event.
scheme = self.scheme()
return SignalManager.event(self, event)
def send(self, widget, channelname, value, signal_id):
"""
send method compatible with OWBaseWidget.
"""
scheme = self.scheme()
try:
node = scheme.node_for_widget(widget)
except KeyError:
# The Node/Widget was already removed from the scheme.
log.debug("Node for %r is not in the scheme.", widget)
return
try:
channel = node.output_channel(channelname)
except ValueError:
log.error("%r is not valid signal name for %r", channelname, node.description.name)
return
# Expand the signal_id with the unique widget id and the
# channel name. This is needed for OWBaseWidget's input
# handlers (Multiple flag).
signal_id = (widget.widget_id, channelname, signal_id)
SignalManager.send(self, node, channel, value, signal_id)
def eventFilter(self, receiver, event):
if event.type() == QEvent.DeferredDelete and receiver is self.scheme():
try:
state = self.runtime_state()
except AttributeError:
# If the scheme (which is a parent of this object) is
# already being deleted the SignalManager can also be in
# the process of destruction (noticeable by its __dict__
# being empty). There is nothing really to do in this
# case.
state = None
if state == SignalManager.Processing:
log.info("Deferring a 'DeferredDelete' event for the Scheme "
"instance until SignalManager exits the current "
"update loop.")
event.setAccepted(False)
self.processingFinished.connect(self.scheme().deleteLater)
self.__scheme_deleted = True
return True
return SignalManager.eventFilter(self, receiver, event)
def eventFilter(self, receiver, event):
if event.type() == QEvent.DeferredDelete and receiver is self.scheme():
try:
state = self.runtime_state()
except AttributeError:
# If the scheme (which is a parent of this object) is
# already being deleted the SignalManager can also be in
# the process of destruction (noticeable by its __dict__
# being empty). There is nothing really to do in this
# case.
state = None
if state == SignalManager.Processing:
log.info(
"Deferring a 'DeferredDelete' event for the Scheme "
"instance until SignalManager exits the current "
"update loop."
)
event.setAccepted(False)
self.processingFinished.connect(self.scheme().deleteLater)
self.__scheme_deleted = True
return True
return SignalManager.eventFilter(self, receiver, event)
